Towards a measurement of the half-life of ⁶⁰Fe for stellar and early Solar System models

Autor(en)

K. Ostdiek, T. Anderson, W. Bauder, M. Bowers, P. Collon, R. Dressler, J. Greene, Walter Kutschera, W. Lu, M. Paul, D. Robertson, D. Schumann, M. Skulski, A. Wallner

Abstrakt

Radioisotopes, produced in stars and ejected into the Interstellar

Medium, are important for constraining stellar and early Solar System

(ESS) models. In particular, the half-life of the radioisotope, ⁶⁰Fe,

can have an impact on calculations for the timing for ESS events, the

distance to nearby Supernovae, and the brightness of individual,

non-steady-state ⁶⁰Fe gamma ray sources in the Galaxy. A

half-life measurement has been undertaken at the University of Notre

Dame and measurements of the ⁶⁰Fe/⁵⁶Fe

concentration of our samples using Accelerator Mass Spectrometry has

begun. This result will be coupled with an activity measurement of the

isomeric decay in ⁶⁰Co, which is the decay product of ⁶⁰Fe. Preliminary half-life estimates of (2.53 ± 0.24) × 10⁶ years seem to confirm the recent measurement by Rugel et al. (2009).

Organisation(en)

Isotopenphysik

Externe Organisation(en)

University of Notre Dame, Argonne National Laboratory, Paul Scherrer Institute, Hebrew University Jerusalem, Australian National University

Journal

Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms

Band

361

Seiten

638-642

Anzahl der Seiten

5

ISSN

0168-583X

DOI

https://doi.org/10.1016/j.nimb.2015.05.033

Publikationsdatum

10-2015

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics, Instrumentation

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/5b239d0d-b2e4-407a-a590-d146f580b194